Well the first thing that comes to mind is the incredibly horrible failure rate of common contraceptives, and the unplanned pregnancy rate and birth rate that goes with them.
By "evidence" I mean evidence that allele frequencies have noticeably changed. These are all hypotheses about things that might be affecting allele frequencies but, again, my standing assumption is that the timescales are too short.
I haven't found any evidence that allele frequencies have changed - I just started to look into this, and didn't even have a search term when I started. Due to that, I thought it was obvious that I didn't have anything on micro-evolution, so I gave you the evidence I do have which, even though does not do anything to support the idea that allele frequencies are being influenced, does support the idea that there's potential for a lot of influence.
Hmm. A contraceptive and unplanned pregnancy survey by 23andme would be so interesting... I wonder if they ...
If it's worth saying, but not worth its own post, even in Discussion, it goes here.