...asking myself - how did this happen? Start to believe that we are collecting names. This has some cons sometimes:
phone calls can be interesting - people never find numbers and they get confused by all the names;
your snail mail is for sure lost every now and then since you can not put that many names on the mailbox;
children in this position have a living hell in elementary school when forms are to be filled in and signed by one or both parents - names never match;
all registers have multiple entries for your phone number, i.e. if someone uses the register to call doing some marketing related then you get one call for each entry...
Try making a reservation for a "family event" - I can remember one of the times when "we" tried to have a "family dinner" at some place. Of course arriving in different cars from different locations, having some "additional" family members (girlfriends/boyfriends/husbands/wives/children) with us as well. We are kind of a distributed family. FUN. Four of us arrive and enter the place, the guy working there asks us if there is a reservation and if so in what name. This was followed by four of us looking at each others asking "who made the reservation? I did not this time". It all ended with us telling the guy "it is kind of a bigger group, around 25 or so". Have to admit that all of us laughed at this comment;
...
...and some pros:
phone calls again - if you don't want to be found this with multiple entries can be good since people get confused and give up thinking that there has to be a mistake;
snail mail - you tend to not get some post, some annoying things tend to disappear;
you get the pleasure of seeing a surprised face when you try to explain these things to other people;
people don't "associate" to your parents/brothers/sisters when they see/hear your name, i.e. you are not compared with them all the time;