merely my personal opinion:
i've never had a diaper party-- this is first pregg
==in reguards to being 'tacky', i think the idea of a 'daddy diaper' party is being missed here, it is not about 'getting gifts' or accumulating diapers. It is about giving dad a time pre-baby with his friends. allowing them to do 'guy stuff'/hang out/sports/poker whatever they love doing together.
[my husband, personally doesn't want to be involved with the 'baby shower' he jokes "what am i going to do 'ohhh, what a sweet little outfit' (said in high-pitched voice)". and i get it, this is a traditionally female event, and although i'm not a traditional person, i think i'll like having just all the girls together]
== also, the 'trade-off', if you will, bring a pack of diapers and enjoy food and drinks on me? i mean, diapers, yes when added up over years are expensive-- but come on... pamper's cruiser-$16 bucks online @ walmart plus if you take the time to clip a coupon even cheaper than that.
--A guy could easily spend $16 on his own dinner and drinks if the guys went out... so, if you are planning on providing food/drinks i.e.'BBQ and Beer', i mean come on... not tacky, just a party.