Avoiding security guards in stores - by: Excalibur

Can you guys help me with some advice? How can I be as stealthy as possible in a clothing store or any store? Today a guard threw me out just as I was getting ready to talk to a girl. He said "Hey you. Get out of here!" I was calm, even ballsy. I said, with a slight smile on my face "Yes, What's the problem?" (Acting like he's making a mistake). He said something like "You already came in here 3 or 4 times" and "I don't want to see you here again". I didn't put any any kind of fight or verbal argument. I just let him push me outside.
So I'm thinking this is the solution:
- don't go in that store for at least 1 week
-don't go in any store more than once in the same day
-always change-up my clothing everyday (put on a different jacket, jeans, leave my glassses home, etc)
-really pretend like I'm out shopping (walk slow, look at items and the price-tag, normal face-not smile, not be sad)
-avoid eye-contact with the guards
-don't do the drills near the guards (enough distance to make sure the guard can't hear us-me and the girl)
What do you think about this? Do you have anything else to add? Or even change? Maybe I'm making a mistake in my judgement.

Edit. Yes. I already figured out I'm an idiot for going in that store so many times in a single day, so no need to tell me this.