It is so easy to send transactions that you have a problem, do you ignore transactions under a certain amount (leading to a potential group going under the limi

It is so easy to send transactions that you have a problem, do you ignore transactions under a certain amount (leading to a potential group going under the limit for mixing) or do you introduce these problems. If you don't mind false positives it will be easy enough, but I don't know how you would develop a system that would work. Well I would say someone brought forward the concept of the US or other entity marking bitcoins, that could definitely work, but I don't know if that would solve the problem of laundering non-marked bitcoins.