But my main concern still stands, will shortening of the forks effect steering or create wobbles or endanger the rider any other way.
Riding any motorcycle endangers you in almost every way, so there's that. :-)
As I indicated previously, lowering the moto and its steering will likely have negative effects on handling. Pegs will scrape unless they, too are modified. Slow handling will be awkward. As posercycles, Bricks seem to be today's choice though.
The more that stock geometry is changed, the more likely it is that destabilization will occur. It's a credit to your diligence that you've found some believable information from a couple of remodelers. If you want a ride that has more use than just the attracting of copulation opportunities, go with the more conservative approach. Making one stable at speed takes extra effort and is not for people on tight budgets.
Here are some examples.
