You report the impending return to Peoria of Scott Heimdal, kidnapped, then ransomed in Colombia, in a human interest vein: ''a homecoming for a man most Peorians have never met, in a town where he has not lived for years'' (news article, July 1). But isn't there more to it? The demands of the kidnappers have been acceded to -albeit by good people with good intentions. Terrorists elsewhere may be encouraged by this.