Well if your at all familiar with the main messages of this blog, you may be thinking "why would this post have this title?" Simply, because it is true. But allow me to elaborate before the thought that we shouldn't be fishers of men may enter (because whether we should and whether we are commanded to are completely different).
First lets look to what Scripture says:
And he saith unto them, Follow me, and I will make you fishers of men.
Jesus commanded us to follow Him; and in doing so, He said He would make us fishers of men. This is encouraging because in it we see that the responsibility is; our response in following, rested on His ability to make us.
But it is also one truth without conditions or exceptions - Jesus didn't say I may, or I will possibly; He said if we follow Him, He will make us fishers of men. We know Jesus never lied, and His promises are true and sure. So the challenge is in looking at Jesus' words in reverse - if we are not fishers of men, we are not following Him.