Just let the event pass, unacknowledged so as to not give them any publicity or cause for more litigation. After all, that's their bread and butter.

multicolored signs that are modeled on the ones that his crew uses, only the signs would have words culled from Phelp's favorite book that talk about things like forgiving sinners and showing mercy to assholes.

I think a "We forgive you, you hate-mongering asshole, your trespasses" demonstration would be a suitable punctuation to the end of that bastard's miserable life. Call it High Road: With a Vengeance!

to be put in the ground and to have nobody give a royal fuck.

Take the high road. Maybe when the WBC finally realizes nobody truly cares they'll finally collapse.

Let his passing be in obscurity and go unnoticed.

Don't give him and his incestuous band of followers any further attention. Let them wither and disappear on their own.

LGBT groups can show up with placards reading 'God Loves Everyone'. Hand out baked goods.

Eh. Maybe not, it's just a thought.
[hr][font color="blue"][center]If you don't give yourself the same benefit of a doubt you'd give anyone else, you're cheating someone.[/center][/font][hr]

"We forgive you"

The media would have a field day

as he should have been in life.