Comment by danny_taco

In my experience it doesn't do much. For example, I made the mistake of contributing to the campaign of a politician. Now I get texts from candidates all over the country. If I reply STOP to one, I just get sent more texts from another number, for another candidate in another state. I just got tired of replying with STOP after the 20th time. This just guarantees I'm never giving any money to any candidate ever again.