I don't mind them if they are on a sliding scale. And certainly like things for weddings and baptisms that are very ceremonial and long.  Keep them short and sweet, ask the priest or deacon to do the same and give what you can afford.  Of if you want the full meal deal, pay accordingly.  But don't have them in the middle of mass.  Before or after if it works for you and the priest with notice to the congregation in advance.