Back to Hummergirls original question this normal it does not create any problems such as tire wear or durability of the bar or any other componants.
As far as the tierod being the weak link they are much cheaper and a whole lot easier to replace in the field than say a steering gear or pitman arm. Every mechanical piece of equipment has to have a weak link or FUSE.
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I don't need to buy one, they pay me to abuse (oops) drive them. 
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