>>>>Actually I can since signage does not a contract make for a number of good reasons (vision impaired, foreign language, illiterate, is the sign clearly visible at all entrances, was it visible at the time...).
>>>>The store can not legally force me to submit to a search of my person or property unless they have probable cause under shopkeepers privilege. Refusing search is not probalbe cause for a store or an LEO. The only real option they have is to declare the person refusing PNG (not allow me in there again).
WRONG. Where you are getting this legal reasoning is beyond me, but it is very wrong.