This photograph is amusing, whether or not it is doctored. (link) It demonstrates a technique we see a lot from certain folks, and even occasionally from folks from whom we'd not normally expect it. It's the old "ad hominem" response.
Suppose I'm the bald guy in the picture, challenging the "church" and its supposed authority - warning people to turn to Jesus. It's an invalid apologetic to be the holding the sign saying, "Turretinfan is an anonymous, anti-[insert church name here] jerk, don't listen to him."
And same goes for me: I can't be the young guy simply calling those on the other side jerks, even when they are.
May God give us wisdom to defend the truth appropriately!