If by "pegs" you are referring to the "lean sensor" metal tabs on the bottom of the Suzuki floorboards, then an occasional scrape tells you that you are leaning at the maximum lean angle where no other part of the motorcycle will touch the ground. If you lean farther than that you can cause devices such as highway bars to touch, which in some cases could lift the front wheel off the ground. Not a good thing...

If you are talking about scraping highway pegs than you are way out of my league! That IMO would be suicidal...

It can be dangerous depending on how much you lean. Once you start scrapping floorboards you're ok because they flex and your rear tire will keep contact on the road. If you start scrapping on something solid like engine guards you will lose traction on the rear wheel and possibly go down.

It is not good to scrap anything, your losing metal every time.

Hope this helps

Scraping pegs means that you are at the absolute limit of how far the bike will lean. It also means that you're very close to having hard parts hit the ground, which can cause a wheel to lose traction and cause a lowside crash.

The real problem is that if you are zooming around a curve with the pegs/boards dragging, your frame or engine cases are probably less than 1 inch above the road surface. So what happens if you hit a big ugly pothole patch? What if the curve tightens up on you and you have to turn harder? What if - what if - what if...

Riding on the street with no margin for error is a really bad idea.

I don't believe it's a big danger at all. In fact, in a motorcycle training video called "Ride like a Pro", the instructor says that "the sound of the floorboard scraping should be music to your ears, because it lets you know you are riding your bike to the limit of it's lean capabilities". However, you should not continue to lean FURTHER once you hear the scraping.

In my years of experience 'scraping' each bike is different and just 'touching' the lean angle sensors as Suzuki calls them in an of itself is not an issue unless you react, straighten your bike and have issues in that corner. Amazingly that is usually the initial reaction of anyone who scrapes.

Once you get familiar with the sound it does become a bit like music to your ears as the floor boards articulate as well and yes, when you get to the limits of your boards moving up you will start to scrape more rigid objects....remember each bike is different.

Ex: My VL1500 LC scrapes the hiway pegs at the same time as the floor boards, both of which move up and give more room to lean. When the pipes(on the right) or kick stand bracket on the left start to touch i am at my limit.

On my C109RT it is also the lickstand bracket on the left and most of the after market exhaust system on the right that warn me my limit has been reached. Yes there is the danger of going down, but many times it is the riders action and not the bike that causes the failure in a corner.

One a side note....if you have to ask this question DON'T SCRAPE YOUR BOARDS. It's a safe bet your riding level is best served taking things a bit easier.