Pre-evangelism is the notion of building up relationships with non-christians before introducing them to the gospel. It seems reasonable. However, the problem is that many of us get 'stuck' in pre-evangelism and rarely actually reach the 'evangelising' phase. It makes me wonder if pre-evangelism is really just a cop-out for no-evangelism.
Actually it is questionable how biblical such a concept is. I am not suggesting it is unbiblical, more that it is non-biblical. Certainly we get no inkling Jesus spent time building up relationships with folks before confronting them with the demands of the Kingdom. Nor does Paul spend time in a community building up a network of friendships before evangelizing; he evangelizes from the word go. The disciples are sent by Jesus to various surrounding towns and instructed them that if people did not receive them then they are to leave the town and move to the next.
Now, I am not saying we should immediately jump in evangelistically in every relationship of life. I am simply cautioning against creating a default dogma called friendship pre-evangelism that may be an excuse for interminally evading gospel embarrassment or even poo-pooing 'cold evangelism', the most evident method in the NT.