Even with telepathy status games and indirect hiding might still happen. And it depends also what kind of access. If everybody feels every thought of everybody else it could easily be overwhelming and pure cognitive economy could favour opting out.
If you can choose to access at will anybodys mental state you can adopt strategies to people not opt to do so in critical moments. If you build up yourself a reputation for violent thoughts people might want to try to avoid your mind out of comfort granting you a degree of privacy (similar effects for boringness etc). You could also attach meanings to your thoughts that other people would not associate in essence encrypting your mind so that they can't natively read it in full clarity (even if they have full cryptotext access) (may or may not be synonymous with going mad).
If everybody has intimate psychological contact your mind could form dependencies to parts of other minds without which you could not psychologically function. So people might want to opt out for wanting to remain individuals and not fuse with the hive mind. Even if only others formed such dependencies could be bothersome because you don't only think for yourself but potentially for others as well.
It seems to open a can of worms that would need to be dealt somehow and those solutions would be far more important to opting than whether it would be cool.
I asked this question on IRC before and got some surprising answers.
Suppose, for the sake of argument, you get cryo-preserved and eventually wake up as an upload. Maybe meat->sim transfer ends up being much easier than sim->meat or meat->meat, or something. Further suppose that you are not particularly averse to a digital-only existence, at least not enough to specifically prohibit reviving you if this is the only option. Yet further suppose that sim-you is identical to meat-you for all purposes that meat-you cared about (including all your hidden desires and character faults). Let's also preemptively assume that any other attempts to fight this hypothetical have been satisfactorily resolved, just to get this out of the way.
Now, in the "real world", or at least in the simulation level we are at, there is no evidence that telepathy of any kind exists or is even possible. However, in the sim-world there is no technological reason it cannot be implemented in some way, for just thoughts, or just feelings, or both. There is a lot to be said for having this kind of connection between people (or sims). It gets rid of or marginalizes deception, status games, mis-communication-based biases and fallacies. On the other hand, your privacy disappears completely and so do any advantages over others the meat-you might want to retain in the digital world. And what you perceive as your faults are out there for everyone to see and feel.
As a new upload, you are informed that many "people" decided to get integrated into the telepathic society and appear to be happy about it, with few, if any, defections. There is also the group of those who opted out, and it looks basically like your "normal" mundane human society. There is only a limited and strictly monitored interaction between the two worlds to prevent exploitation/manipulation.
Would you choose to get fully integrated or stay as human-like as possible? Feel free to suggest any other alternative (suicide, start a partially integrated society, etc.).
P.S. This topic has been rather extensively covered in science fiction, but I could not find a quality online discussion anywhere.