It is something I often do, to gauge the mindset of a community. Its openness, how prone they are to being offended, hostility, etc.
Posting something similar, adapted to the issues of the_donald for instance, yielded eerily similar results. Accusations, open hostility, bans, etc. Same for some lgb subs.
The open and accepting trans and lgb communities I've posted similar comments were met with understanding, a willingness to educate. They would've responded by pointing out that the 2 statements are not equal, cannot be compared. The 15yo sharing the nudes hasn't spent years talking to professionals about it. While the 15yo contemplating transitioning most probably has, therefore is much more informed and quite possibly can make that decision.
One of the things we try to teach our youngsters is that while you might've had bad experiences in the past, it does not mean every new person you meet will hurt you. Something most people tend to forget.