Besieged by Violets

My garden is looking glorious but I have a profusion of violets this year. They are everywhere even popping up between cracks in the paving.
This morning I pulled up loads and felt really bad doing it, the smell is delicious and they look so sweet but I don't want them depleting the soil. Does anyone have any ideas on keeping these lovely little flowers under control?

 

i have the same problem, theres loads this year!!! i let them grow in one border out the back, but theyre even in the lawn tihs year!