Having the right to do something doesn't mean it's right to do so. Though, we have to wait for Hasbro to give us a reason. It better be a good one. All this uproar from the fans, in my opinion, is necessary to make sure Hasbro actually wants to give a reply to settle us down, rather than try to tip-toe around us if we are not doing anything about it.
Then we can judge if the reason is reasonable enough. If it is, we will settle down eventually, like the Derpy incident. If it isn't... Well, Hasbro's gonna have a hard time for a loooooooooong while.
Forced how?
Hasbro's partner will sue = why would they?
Lose potential customers = more like gain thousands more
Children would not like it = my 6 year old cousins adores it
Parents thinks it violent = there are lots of worse things on the Internet ...ahem, cupcakes
Just paranoid = ...this explains everything
And this doesn't explain why 'Friendship is Witchcraft' and 'Rainbow Dash Presents' got shot down too. Especially the latter, that doesn't even use footage from the series.
Aren't the conventions for adults? Children can't play it without their parent's help to download it anyway. Why would that be a problem?