If I don't understand a comment, I either ignore it or ask what the person meant (depending on the situation and my mood at the time).

I don't know anything about Hawaii Five-0, but what you describe here sounds quite reasonable and funny. It's not like you said the guy actually wanted to have sex with his mother!

What also tends to happen is that people take their cue from the first couple of responses. Then the dogpiling begins.

I'm sorry that happened and hope you have better experiences in another group!