Its a subjective opinion. Most traders probably don't welcome the bad guys. If anything its those playing the bad guys need the "good" guys.
This is the fundamental issue here, and largely the fundamental issue behind the whole Open vs Solo debate.
As we have discussed for three threads now, the "good" guys don't really need the "bad" guys, except for a small number of Bounty Hunter PvPers who deliberately go after PC bad guys. Most PvPers (i think) don't generally define themselves so firmly, they are just happy to get any quality PvP.
Targetting of traders is not good PvP. Good PvP is a challenge, traders are not a challenge. Targetting of traders is good Piracy though. And can be a good experience for the trader as well if done "right" - ie: Don't bankrupt the trader with the demands, let them go if they comply, etc. Piracy isn't specifically PvP. In fact, fatal level PvP should be the last resort of the Pirate, i think you would agree Jordan.
So, what is the problem here?
Just my opinion, but are we not back to people who have a desire to pew-pew can be split into roughly two groups? Those who want competitive PvP, and those who want one sided PvP?
Who "needs" the bad guys from these groups?
Those who want competitive PvP certainly don't need them. You simply find others who are interested in PvP and go head to head together with each other wherever you encounter each other.
Those who want simply to kill player targets don't need bad guys. They are the bad guys! They need the good guys! But the good guys don't want to be the targets of the bad guys! Hence they avoid them however they can, whether it to be change modes (and here we have the foundations of this debate) or move away from hotspots if possible.
(And sorry if equating good guys here with traders and bad guys with PvPers - its not exactly my intent, just accept the spirit of the phrasing rather than the literal interpretation. For sure there are good guy PvPers and bad guy traders... erm, i presume).
Disclaimer: I'm not a trader.