Removing a skin tag should not cause any cancer.
You can get a skin tag removal tool that works great at removing skin tags at home and I've used it myself and it's called the Tag Band Skin Tag removal tool.
It cost's around $20.00 and I think I paid around $26.00 including shipping for the Tag Band Skin Tag removal tool which was well worth it to remove the skin tag at home.
If I had went to the doctor to get the skin tag removed it would've cost me around $500.00 or more to have the doctor remove the skin tag where's the Tag Band Skin Tag removal tool removed the skin tag at home for a lot less.