You have several issues.
Breach of Contract
When you sign up with each of those services you are entering a legally binding contract and must comply with the terms of that contract.
For example, this is taken from Facebook's terms:
Here are some commitments you make to us relating to registering and maintaining the security of your account:
- You will not provide any false personal information on Facebook, or create an account for anyone other than yourself without permission.
- You will not create more than one personal account.
I haven't checked but its a fair bet that the other services have similar terms.
Unless you have permission, what you are doing breaches these terms of service. If what you do causes damage to Facebook et al then they can sue you and your employer for damages. Even if it doesn't they can probably bar you from having an account for as long as they like.
Improper use of images
This is jurisdictional but it is generally required to have the permission of the subject of a photograph where that photograph is used for commercial gain. There are exceptions where the person is not the primary subject (e.g. crowd shots, or images primarily of something else where the person happens to be in the shot) but the type of photos you would use for these services are not going to be exempt. The sanctions for breaching this will be dependent on jurisdiction.
Breach of Copyright
Somebody owns the copyright in those photographs. If you do not have a licence to use them in the way you propose then you are breaching their copyright. The copyright holder can sue for damages (if any) and any profits you make.
An employer is strictly liable for the actions of their employees, jointly and severally with the employee. That means a plaintiff can go after either the employer, the employee or both. An employee may have some statutory or contractual indemnity but this is by no means common.