Easier way to avoid such things, look for people who use the word "sheeple", then disregard everything else they say.
Replying to them and making it twice as visible that the word was used, does not further your cause. It does, however, let you show us that you're so much better and holier than them.
I don't like or agree with every term that everyone uses all the time myself. I just don't bitch about it. I don't tell others how they should express themselves because that's worse than any word they could use, and because I am not their lord and master. The only person I want to control is myself.
That this particular term "sheeple" gets so deeply and visibly under the skin of so many tells me something. It tells me that this word has power, that it's significant, that it must in fact do a very good job of connecting an ugly tendency with an ugly word. "Follower", "lemming", "droid", "trendy", "mindless automaton" etc. all describe the same thing, but for some reason it is the word "sheeple" that so many I'm-better-than-you types fixate on. That's all the more reason to use it.