Reading a recent paper commissioned by messaging security firm Cloudmark , I was shocked to learn that 66% of UK mobile phone users have received spam text messages with that figure rising to 75% among 18 to 24 year olds. Now this report was more focused on mallicious spam in the form of phishing attacks or similar, however just like in email SMS spam can and will, if not properly controlled become a problem. Not just to the end user receiving it but also to the SMS marketing industry as a whole.
The more companies that use lists that were not generated using opt-in mechanisms, the less effective SMS marketing becomes. Do your part and don’t buy lists, save your money, buy our guys a new coffee machine or something! 
We takes steps internally to help prevent spamming and we also offer a wealth of info to help you guys collect opt-in lists that will help improve the effectiveness of your campaigns and increase your ROI.