On the other hand do not use both accounts within one discussion. Don't use both accounts to vote on the same thread.
This is a very resonable recommendation.
Given that you have written the thread...
I considered this beforehand of course. Even if I did I would have plausible deniability, which is what counts. Even if regular LWers suspected something the pretense could be held. See also http://lesswrong.com/lw/24o/eight_short_studies_on_excuses/
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.