custom taxes are Haraam..

[CBPian]

For me, if what is being said is correct, it relates to kind of extortion money collected at check points by various warlords in period pre-islam and even now for passing through/into their territories. Ofcourse it was used for their personal well being. In a state, customs taxes are given back to the community in the form of civic services and other amenities which is paid willfully and there is expectation from both parties why it is paid and received.
Ofcourse we should strive towards more taxes which are based on Islamic guidance and practical at the same time.
Allah knows the best.