i think this is a "know your audience" type of thing. Initial thoughts on reading it, its a bit much but - my dad and i compete to send each other rude cards but my mum i send nice fluffy stuff.
they're your friends if you know they will find it funny go for it. Moonpig won't create your card for you but you can upload images (watch out for copyright) and they will print and send. If you try
https://www.thortful.com/ they have some good funny ones, you might find something that appeals.