Yes, and no. I'm able to store my bicycle inside the office at work, and don't generally run errands on the way home, so I don't carry a lock on my commute.

However, after I've gone home and showered (15 mi. commute pretty much necessitates a shower upon returning home.), I'll go back out with my bag and a lock to run any errands that may need done. I'm only about a mile from shopping, so it's not a big inconvenience for me not to be able to run errands on the way home. Can't fit many groceries in my bag with my laptop and change of clothes anyway, and I'd much rather run errands in casual clothes after a short cruise than at the end of a 15 mi. ride in cycling clothes and dripping with sweat.

The one time I stopped at Target on the way home, they refused to let me in the store with my bike and wouldn't let me leave it behind at the customer service counter, so I simply left.

I can understand your reaction because I was upset at the time. I only needed to grab one thing real quick, and Target is 5 or so miles from home unlike the downtown area, where I do most of my shopping, that is a mile from home. In restrospect though, I really had no valid reason to be upset with them. If I need to stop by that particular shopping area in the future I'll plan ahead and bring a lock.

-Trevor