When Vonage or the underwriters call or email you asking whether you will pay, here's a possible answer.
"I understand that there are four class action suits filed against Vonage and the underwriters. Until those complete I won't be able to determine my liability. As it stands right now, it appears that was purported to be Vonage IPO DSP participation, turned out to be attempted robbery. Being an unwilling potential victim, I won't be paying for the allocation. And if I detect any negative impact on my credit report, I will have a personal injury attorney use that damage and sue you when the class action suits are settled. In the mean time, please mail me a copy of all documents that have my signature, and also a copy of your compliance department approved new customer/brokerage account form, that complies with NASD Rule 2310. Goodbye"