Protocol for receiving envelopes

I've been to a few weddings where there was a mailbox or a birdcage at the entrance - for guests to put their envelopes so they wouldn't have to worry about them for the rest of the night.

I thought that was creative & wanted to duplicate it...but our parents have said its rude...that the guests should give you their gift and we should thank them personally & hand them the favor (in addition to the written thank you cards).

Does anyone have any thoughts on this matter? I understand our parents position but I'm also concerned about the guests...and, honestly, us losing the envelopes after they give them to us!

I'd like to think that none of us are throwing a wedding just for the money. Realistically speaking, most gifts will just cover the cost per plate and maybe a little more. Getting those envelopes may not be a big deal for us...but it is for our guests. For all the reasons why you like giving gifts :)

That being said, its important to know how to handle them with care and respect. At my cousin's wedding, I tried to give her the envelope and she was too busy dancing and REFUSED TO TAKE IT!!! She actually told me that she didn't want it! (which i thought was a little rude. i don't give out $150 every day...) As a result, many people threw their envelopes on her table, many had cash - and she never received them. : (

I like the idea of handing them over to a trusted family member - and I have just the right person in mind! Thanks, everyone for all your input!