They should not have been using public IP addresses that were not allocated to them. They should be using the 192.168.0.0/16, 10.0.0.0/8 or 172.16.0.0/12 ranges which are specifically allocated for private network use.
I think you mean.... the death of the web itself.
Were this to cause less use of condoms, surely there would be increased spreading of sexually transmitted diseases such as HIV, hepatitis, etc?
No method of contraception other than condoms protects against this.