Most ISP will not capture trasitted traffic . The top priority of the ISP , which provides Interconnection to customer is to ensure that packet are transmit as fast as possible with the minimal culcumative delay. Along with that , keeping the Route table as small as possible but accurately is another important thing to do.

Of course the ISP router/switch must examine the packet, but just to route the packets into the appropriate next hop until the packet reach its destination. Keeping track of the origin of the packets is out of each ISP scope, require a HUGE database / route table of the ISP , thus reducing significantly the performance of the transit network.

Of course , security must be taken into account. Log , Intrusion detection system , firewall are implemented , in the manner of prividing flexible security but also keep the delay minimal.

Security and performance must be balanced.

I send a packet from Viet Nam , it will transmit over 30 hops to reach a web server in SanJose. Will it be recorded for 30 hops ?????