First of all, nobody has the right to shop for leniencies. If (a) you learn the sugya and come out this way and are a person who is at the level of a ????? ????? ??????; or (b) you have a rav whom you follow lekula and lechumra and he paskens this way, only then would following such leniencies be sanctioned by halacha and common sense.
Second of all, and this is directed more to those in category (b); obviously you must be aware of the nature of each ingredient in order to go with the view I mentioned. Just because it is allowed doesn’t in any way give one the right to be nonchalant and negligent about it. So, either do some real research, or (preferred) ask someone who is an expert in this area to teach you what is what.
Finally, a word of advice: Be accommodating and use common sense. Don’t “trick” people into eating food you hold is kosher if they would never buy it. Besides for being wrong, it’s just plain stupid.