WikiHow offers suggestions on how to avoid that pesky convert-at-all-costs Christian:
- Show them that you disagree with them in other matters, too. Point out that there are disagreements that may not be resolved.
- Talk to them about befriending people with different political, social, and intellectual belief. Show that many such arguments can get just as heated and emotional as religious arguments, and yet people of different political fractions are willing to befriend each other.
There’s also a warning to potential victims of evangelism:
Do NOT try to counterconvert them. Doing that will just turn it into a long and messy argument.
Which I suppose makes you a more polite person… but takes all the fun out of pointing out the fallacies they use when making their argument.
Anyway, the site is a wiki, so feel free to edit it!
Or you can just post your suggestions here.