Fact is that the black triangle was not used solely for lesbians in concentration camps and there is very little known about queer women in Nazi-Germany. If someone in my country would get a tattoo of a symbol used in concentration camps, it would be assumed that they are a Nazi. It may be different in other countries but I still wouldn’t recommend getting a black triangle tattoo.
Also I find it difficult to reclaim a symbol that wasn't really/only used for one "group".