Eat more by logging calories

Yes

Part of the reason I started logging was that I was no longer able to decide whether I had eaten enough or too much after I started working out. It was much easier to tell when I was less active. Some days I feel like I'm starving, and others I have to work to get in calories.

Do people who log calories well and accurately on MFP sometimes feel that they actually eat MORE than they normally would if they just ate and didn't record because you just eat up to your daily limit?

Yep cause I see I still technically have a "spare" 100 cal for the day and I start dreaming up what I can spend htem on, whereas if I don't log I'll feel guilty and avoid snacking... usually anyways, going through a phase where I want snacks though.

No, but I think that some people, after having counted calories for a while, become much more conscious of their food choices and tend to select foods that have lower calorie density and provide better satiety. This can create fullness and allow for higher food volumes.

Prior to them making the above changes, I think it's reasonable to assume the vast majority would over-eat.

Yes and no.

Yes, there are days that, due to poor planning, it's 9pm and I'm staring a 500 calorie shortage in the face, even though I'm not feeling particularly hungry. So I end up eating a pretty hefty snack at times where I wouldn't normally eat if I wasn't aware of my calorie intake. It seemed counterintuitive for me to eat when I wasn't feeling hungry, but I've figured out that just a couple of days at a large calorie deficit brings back powerful cravings for junk food and fast food, and I'll end up sabotaging myself.

However, the only reason I have a calorie deficit in the first place is because logging calories makes me make more responsible choices. Left to my own devices, no, I wouldn't be eating a peanut butter and banana sandwich at 9:30pm, but I would have had a white chocolate mocha and a cream cheese danish for breakfast, a double quarter pounder with cheese meal for lunch, and chicken fried rice for dinner.

I've definitely learned to eat more. I log my exercise and eat most, if not all, my exercise calories back. I found I feel healthier and more able to exercise on a daily basis when I do. I'm now 6 1/2 months in (although I didn't join MFP until about a month after I started my journey) and haven't experienced any plateaus. I credit getting an appropriate amount of calories - calories that are nutrient dense, not just calories for calorie sake, as the reason I register loss each week, even now as I'm pretty close to my goal and have been slowly upping my base calorie goal.