It is definitely ok to introduce Shugden to everyone immediately. Shugden's whole body is representative of the paths and stages to full enlightenment. Every part of Shugden is a facet of enlightenment. Therefore viewing, thinking, meditating or contemplating even for a short time will plant the seeds of awakening within the viewer's mindstream.
When anyone worships Shugden, he may grant your immediate pleas for help, but ultimately and eventually Shugden will lead you to a lama, lineage and pure Buddha Dharma. It doesn't matter what lineage you find, but Shugden will lead you there. Shugden should no longer be considered a protector of just Je Rinpoche's lineage, but a world peace protector as Gangchen Rinpoche mentions many times.
So for those in difficult situations or trades that might be 'shady', all the more we should introduce Shugden to them from compassion. When people are in dire straits, addicted to intoxicants, engaged in vice, or simply desperate, they don't have the right frame of mind to listen to Lam Rim and all the beautiful teachings yet. If there's a man in a burning house, ask Shugden for help to rescue him first then introduce Lam Rim and et al when he is safe & comfortable later. Eventually Shugden will lead them to Buddha Dharma whether now or a future time. That is Shugden's vow and why he arose as a Dharma protector due to the kindness of Desi Sangye Gyatso.
TK