I have to agree with the railroading issue. Skyrim is one of the worst games I know about this, too. You can get railroaded into a quest just by overhearing a conversation. Someone mentions joining the Stormcloaks and the PC writes in his journal to "Join the Stormcloak Rebellion". Not! What if I don't like the Stormcloaks for some reason? Why would I write in my private journal a reminder to join them? I wouldn't. This is just another example of Bethesda's strong-arm technique of getting you involved in every single primary questline in the game, whether, as a role-player, you're interested in them or not.
The Stones of Barenziah are doubly bad, because you not only get stuck with a quest in your journal, but you can get stuck with up to 24 of the damned things in your inventory. They're useless clutter that you can't get rid of if you don't join the Thieves Guild, or unless you install a mod that allows you to drop them. That mod still doesn't remove the quest from your journal and it's "clutter" there, just like the stones were in your inventory.
So, yes, sajuukkhar9000, this is "railroading" as the term is defined in modern usage. To wit: "1. V., to coerce, trick, or seduce others into a course of action that they would not otherwise choose." (Urban Dictionary).
We see this everywhere in this game. You get railroaded into quests by reading books, hearing conversations, picking up objects, or having to get involved in one quest to complete an entirely unrelated quest. After you've been around the block a few (dozen) times you probably recognize the danger signs like "Unusual Gem", Stormcloak or Imperial Patrols, Windhelm Guards, and books named "Legend of Red Eagle" or "Boethiah's Proving", and avoid them. The first-time player is probably going to be suckered into every single "stealth quest" in the game.