I really think the best thing to do is to ignore. If you have numbers you can block on your phone, email ,etc......do it. or simply just not be there. constant hounding is totally aggravating and the extent of it depends on the type of people you are dealing with. I think Flipper nails it in his responses. There are those who simply have no concept of boundaries. They get the idea that since you were a part of the group at one time they have some sort of hold on you and it just isn't true. I know of one individual who actually - heard it with my own ears - said to my husband that he was HURT and OFFENDED because he (hubby) no longer went to meetings and commented. seems he really enjoyed my husband's comments (which made me cringe at times because he never really fully bought into it) but, hang in there......do what you like and feel right about and ignore them.....
good luck!