Yes, it is certainly a problem. For one thing, the recommended laxative use is for people who have bowel problems. If you are using them for weight loss then you're already doing damage to your bowel linings because you don't really need them, and, they don't cause weight loss either.
Basically, it is an extremely dangerous practice.
Check out these pages about the dangers of laxative abuse if you're convinced:
http://www.bulimiahelp.org/book/laxa...laxative-abuse
http://www.choosehelp.com/eating-dis...esnt-work.html
I used to use laxatives but am trying to cut back because, I don't want to do permanent damage to something as important as my digestive system and bowels. Please seek help for this, as soon as possible. Every time you use them you risk doing more damage.
One of those pages also links to this:
How can I stop abusing laxatives? Might be worth checking out.
Take care xx