This is a quote from vBSEO
"ANTI-PIRACY AND EULA VIOLATIONS
Crawlability, Inc. reserves the right to include mechanisms for the detection of the vBSEO software piracy and/or general EULA violations. These mechanisms may include the transmission of data from your server to Crawlability, Inc. servers that identify your unique vBSEO license key and forum URL information. Note: NO ADDITIONAL DATA other than what is required to validate your vBSEO license or provide support will be transmitted.
Forums found to be running unauthorized copies of vBSEO will be flagged for review. Anyone violating the vBSEO Acceptable Usage Policy or general EULA terms, will be contacted and requested to uninstall vBSEO immediately. Those who do not comply will be subject to legal action as outlined in this agreement in order to resolve the violation of terms and/or illegal actions. Crawlability, Inc. will seek damages of not less than $5000.00 per license violation to cover the cost of piracy detection, enforcement, and legal fees. "
If you received that PM from someone on vbteam forum, I would not worry.
If you received that PM from YOUR OWN forum, I would send a PM back and see what they do.