Many of us have repeatedly made this suggestion over many years. If alongside our names it said the month and year we joined MN, it would help people realise this was a long standing poster who may have name changed and people might invest far less in what turn out to be troll postings, previously banned posters stirring up shit, DM journos etc.
I belong to many other similar forums and they all do this (some also have the number of postings they have made).
There's a thread now about the recent deletions and how to spot a possible troll and several have made the above suggestion (including me).
I really don't see the objection and every time it is suggested it gets a lot of support. It won't necessarily stop trolls but it might prevent some people investing too much in suspicious new poster threads or make long time users who need to name change not need to assure us they've been here for years (stating Pom Bears, penis beakers etc)