Not eating meat during the 9 days
There are a number of different reasons for not eating meat during the 9 days:
1. Aveilus - Meat is something that makes us happy (אין שמחה אלא בבשר ויין) and therefore in these days of mourning we abstain
2. זכר לקרבנות - We are supposed to remember that during this time the קרבנות were stopped.
Whatever the reason we are supposed to use this to feel the aveilus of the churban. Unfortunately, many people take not eating meat during the 9 days in the wrong direction. Some people love it, as I once heard "and best of all, there's always ice cream or cheese cake for desert".
Those who feel that it is easy and great and they get to eat ice cream all the time, are missing the whole point. They may be doing the minhag but by Aveilus there is supposed to be a kiyum balev, you are supposed to feel something. These people feel no aveilus because they are not eating meat, in fact they are happy. This is a perversion of the minhag. The minhagim are supposed to help you feel aveilus, if they don't you should do something else that will help you feel the aveilus as well. Clearly, we cannot violate the minhag and eat meat even if we don't like meat, on the other hand, we shouldn't be eating gourmet milchig meals and enjoying ourselves either.
These days are supposed to be sad, eating gourmet milchig meals while not technically violating the minhag is certainly violating it's spirit.