Guests Paying For The Wedding...

Thats in really bad taste.

Surely this is a joke

Oh no thats severely tacky and tasteless!

Yes I would say it is in bad taste. However in certain cultures it is actually expected that the bride and grooms family, aunts and uncles, pay for items for the wedding day. It is considered a normal thing to do. I would say if your unsure then talk to a few people in your family that you trust to give you their honest opinion. If they are willing to help out then why not? Only you know how your family will react to it though. I would say if it is a smaller wedding, something more casual and simple then do it.