Yes, it will affect his bandwidth.
If the ISP imposes a data cap, your usage of his connection will contribute to the amount used.
Since what you want to do is most likely against the ISP terms of service, we cannot assist you with this. This topic is closed.http://www.bleepingcomputer.com/forum-rules/
No subject matter will be allowed whose purpose is to defeat existing copyright or security measures. If a user persists and/or the activity is obviously illegal the staff reserves the right to remove such content and/or ban the user. This would also mean encouraging the use or continued use of pirated software is not permitted, and subject to the same consequences.
Edited by Queen-Evie, 22 March 2015 - 12:06 PM.